‹ South Carolina weather by month
South Carolina weather in August
The state broadly agrees with itself in August: afternoons run 90° in Hilton Head Island and 86° in Charleston, with everywhere else in between.
Based on 3 weather stations. Three stations, all on the water — inland South Carolina and the upstate around Greenville run hotter in summer and colder on winter nights than any row here.
Charleston & the Lowcountry
Highs 86–90°, nights 74–77°, and 6.1–6.5 in of rain in a typical August.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Charleston | 86° / 77° | 8 | Peak steam, and the afternoons come down hard. |
| Hilton Head Island | 90° / 74° | 8 | The heaviest month — plan indoor afternoons without guilt. |
The Grand Strand
Highs near 87°, nights around 73°, and 6.3 in of rain in a typical August.
| Place | Highs / lows | Wet days | The short version |
|---|---|---|---|
| Myrtle Beach | 87° / 73° | 8 | Sticky days, warm nights, thunderstorms that clear by dinner. |
Each place above has its own page for the full story — what the month feels like, what to pack, and whether the timing is right.